public override void Draw(RectangleF a_rect)
{
CGColorSpace cs;
CGContext cxt;
RectangleF bds;
cxt = UIGraphics.GetCurrentContext ();
cs = CGColorSpace.CreateDeviceRGB();
if (_vertical)
{
cxt.TranslateCTM (0, this.Bounds.Size.Height);
cxt.ScaleCTM (1f, -1f);
bds = this.Bounds;
}
else
{
cxt.TranslateCTM (0, this.Bounds.Size.Height);
cxt.RotateCTM ((float)(-Math.PI / 2f) );
bds = new RectangleF (0f, 0f, this.Bounds.Size.Height, this.Bounds.Size.Width);
}
cxt.SetFillColorSpace (cs);
cxt.SetStrokeColorSpace (cs);
if (_numLights == 0)
{
int i;
float currentTop = 0f;
if (_bgColor != null)
{
_bgColor.SetColor ();
cxt.FillRect (bds);
}
for (i=0; i<_colorThresholds.Length; i++)
{
LevelMeterColorThreshold thisThresh = _colorThresholds[i];
float val = Math.Min (thisThresh.maxValue, _level);
RectangleF rect = new RectangleF(
0,
(bds.Height) * currentTop,
bds.Width,
(bds.Height) * (val - currentTop)
);
CGColor clr = new CGColor (thisThresh.color.CGColor, _maxIntensity);
cxt.SetFillColor (clr);
cxt.FillRect(rect);
if (_level < thisThresh.maxValue)
break;
currentTop = val;
}
if (_borderColor != null)
{
_borderColor.SetColor ();
cxt.StrokeRect( bds.Inset (.5f, .5f));
}
}
else
{
int light_i;
float lightMinVal = 0f;
float insetAmount, lightVSpace;
lightVSpace = bds.Height / (float)_numLights;
if (lightVSpace < 4f) insetAmount = 0f;
else if (lightVSpace < 8f) insetAmount = 0.5f;
else insetAmount = 1f;
int peakLight = -1;
if (_peakLevel > 0f)
{
peakLight = (int)(_peakLevel * _numLights);
if (peakLight >= _numLights)
peakLight = (int)(_numLights - 1);
}
for (light_i=0; light_i<_numLights; light_i++)
{
float lightMaxVal = (float)(light_i + 1) / (float)_numLights;
float lightIntensity;
RectangleF lightRect;
UIColor lightColor;
if (light_i == peakLight)
{
lightIntensity = _maxIntensity;
}
else
{
lightIntensity = (_level - lightMinVal) / (lightMaxVal - lightMinVal);
lightIntensity = LEVELMETER_CLAMP(0f, lightIntensity, _maxIntensity);
if ((!_variableLightIntensity) && (lightIntensity > 0f))
lightIntensity = _maxIntensity;
}
lightColor = _colorThresholds[0].color;
int color_i;
for (color_i=0; color_i<(_colorThresholds.Length-1); color_i++)
{
LevelMeterColorThreshold thisThresh = _colorThresholds[color_i];
LevelMeterColorThreshold nextThresh = _colorThresholds[color_i + 1];
if (thisThresh.maxValue <= lightMaxVal)
lightColor = nextThresh.color;
}
lightRect = new RectangleF(
0f,
bds.Height * ((float)(light_i) / (float)_numLights),
bds.Width,
bds.Height * (1f / (float)_numLights)
);
lightRect = lightRect.Inset (insetAmount, insetAmount);
if (_bgColor != null)
{
_bgColor.SetColor ();
cxt.FillRect (lightRect);
}
if (lightIntensity == 1f)
{
lightColor.SetColor ();
cxt.FillRect (lightRect);
}
else if (lightIntensity > 0f)
{
CGColor clr = new CGColor (lightColor.CGColor, lightIntensity);
cxt.SetFillColor (clr);
cxt.FillRect (lightRect);
clr.Dispose ();
}
if (_borderColor != null)
{
_borderColor.SetColor ();
cxt.StrokeRect (lightRect.Inset (0.5f, 0.5f));
}
lightMinVal = lightMaxVal;
}
}
cs.Dispose ();
}
